DEPOSITED IN WATER. 
73 
From the Lancaster side of Bolland, we pass by an easy gradation to 
the rather more varied series of millstone grit rocks on the west of the 
Lune, where in general terms we have the following succession : 
{ Millstone grit, coal, &c. of Dockray moor. 
Alternations. 
Millstone grit of Whittington. 
f Crinoidal limestone of Whittington (main lime of Ingleborough). 
Flagstone of Hutton Roof. 
- Shales of great thickness with thin fossiliferous limestone and Coal. 
Black limestone beds. 
Shale. 
Lower or great limestone mass of Kirby Lonsdale. 
This is evidently a series nearly intermediate between those of 
Ingleborough and Bolland : and from all my observations I think it 
probable that in the Bolland district the Nidderdale shales being re- 
duced in thickness, the grits of Grassington and Brimham, (i. e. of 
Ingleborough and Symon seat), are brought near together, and that 
the Bolland and Ribblesdale shales belong chiefly to the Yoredale series. 
On proceeding southward from lower Wharfedale, across Airedale, 
and thence along the summit of drainage and western boundary of 
Yorkshire, the results are somewhat analogous. It must be remembered 
that we here start from a region (Kettlewell dale, Nidderdale, and Green- 
how hill,) where the Yoredale series is extinct or reduced to an argil- 
laceous deposit of no great thickness, but the Nidderdale shales and 
grits remarkably developed. This character may without much error be 
ascribed to the whole of Lower Wharfedale; but yet, about Bolton 
bridge, and still more near Skipton, it cannot be doubted that a great 
part of the shales, over the black beds of limestone, belongs to the 
Yoredale series. 
The appearances about Kildwick and Keighley lead to the con- 
clusion, that there exist in Airedale two members of the millstone grit 
series ; the lower one descending to the Aire near Kildwick, the upper 
Millstone grit 
group 
Yoredale series 
